Frequencies for first 10,000 rows of valign variable in vehicle dataset :

    roadway |
  alignment |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |         65        0.65        0.65
          1 |      7,790       77.90       78.55
          2 |        839        8.39       86.94
          3 |      1,032       10.32       97.26
          4 |         55        0.55       97.81
          8 |        176        1.76       99.57
          9 |         43        0.43      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 22 Oct 2016